Lathe-turret.



H. W. RANSDALL LATHE TURRET', APPLICATION FILED DEC. I. I916.

Patented June 4, 1918.

2 SHEETS-SHEET 1.

- H. w. RANSDA'LL;

LATHE TURREL APPHCATION FILED n c.1.191s.

Patented J 11116 45, 1918;

2 SHEETS-SHEET 2.

HARRY W. RA NSDALL, OF INDIANAPOLIS, INDIANA, ASSIGNOR OF ONE-THIRD TO THEODORE A. MEYER AND ONE-THIRD TO LOUIS APOLIS, INDIANA.

LATHE-runner.

Specification of Letters Patent.

H. KNUE, BOTH 0F INDIAN- Patented June a, 1918.

To all whom it may concern:

Beit known that I, HARRY ll. RANSDALL, a citizen of the United States, residing at Indianapolis, Marion county and State of Indiana, have invented and discovered certain new and useful Improvements inLathe- Turrets, of which the following is a specification. i l i My invention relates to lathe turrets and its objects are to provide a turret head of rigid constructionf capable of supporting rectangular or forged tools of various sizes, one advantage of which is toenable the employment of tools having agreater body of kmetal than usual, thus effecting a greater radiation of heat and enabl ng rapldity of operation to befobtained, such head jbeing constructed to permit the adjustment of said rectangular tools at any desired angle tbs the" :axis of the turret, to provide a turret adapt ed to receive both tools of saidrectangular form and box orroundshank tools,to pro-y handle: to provide meanswherebysuch hand le may belocated atthe bottom ofthe turret near the level of the other operating handles of the adjusting screws; to provide imeans for effectively centering the turret relatively to the spindle and togenerally 1mg prove the construction oflathe turrets.

With these objects in view," invention is embodied 1n preferable formin the construction' and arrangements k hereinafter set forth andillustrated in the accompanying drawings. r a i V Inthesedrawings, Figurel is a perspective view of a lathe turret showing the in vention applied thereto Fig. 2, a top plan view; Fig. 3, a vertical central section and tal flange 16 of a clamping glb whlch is bedof the lathe. Fixed on this cross slide is a cylindrical turretsupporting base meniher 4. on which is rotatably mounted a turret 5 having a hexagonal head and made of a single piece of metal. The base portion of the turret is provided witha flange 6 having a flat horizontal face adapted to bear upon the upperfiat face of the slide audit is also provided with a depending taper; portion 7 having 'a taper lit and bearing against a tapered or cone-shaped bearing in the upper central portion of the slide. The turret is not onlycentered by this tapered fit in the cross slide but also is provided through such fit with a self-adjusting and self-compensating hearing which will take up the wear by permitting the turret to move down in the bearing as the wear occurs, thus always maintaining an accurate seating of the turret and preventing side movements due to wear. The turret is pro vided with an annulargroove 8 which is engaged by gibs 9 which serve to holdthe turret down against the slide. These gibs en gage the turret with a running fit, which permits of the rotatable adjustment of the latter. The gibs are clamped in position by means of screw bolts 11 and after the gibs are once adjustedand fixed in place, it is unnecessary to remove themexcept to replacethe turrethead. l j

Engaging. the turret and extending through a semi-cylindricalhollow column 12 integral with the turret, is a bolt 12 pro- 1 vided at its upper end with anut 13 and at itslower end with a head 14 lying in a chamber 15 formed in the cross slide. This bolt maybe of small diameter as compared with bolts customarily employed in turrets,

adapted to be moved downwardly to exert a downward pressure on the bolt for the purpose of clamping the turret against to tatable movement in its tapered seat and to p be released therefrom by an upward movemerit to permit the turret to beturned. To

accomplish this result. the vertical wall 17 of the gib is provided with interior threads 40 maybe moved into registry.

preferably right hand threads which engage corresponding threads, 18, formed on the upper end of a fiXed double screw, the lower and-smaller portion19 of which is threaded into the slide. A locking screw pin 20 serves to hold this double screw from turning with respect to the slide.

Engaging the gib is the threaded stem'Ql of a horizontally movable operating handle 9.2 which projects through a curved slot 23 formed in the turret supporting b21864; of the cross slide.

Formed in the lower face ofthe turret is an annularseries of holes ineach of which is a 'hardened tapered bushing 24. Adapted to f engage any one of these openings as -a single positioning on locating pin 26 movablein a bushing 25 mounted in a vertical opening formed inf the base member 4 and iwhichpinis'provided with a tapered head 27vw-herebya close and accurate fit is ob tainedwith the hole in the turret into which it'may be projected. Below this-pin is mounted; an upwardly pressing spring 28,

jaffording *means to carry the pin upwardly.

The pin isprovided with-a slot 29 which is engagedby onearm -30 of'a bell crank I ever,

the other arm 31 of which projects up- Wardlyinto the slot 23 in vline with the smmove'ment of the handle 22, whereby as the handle 15 moved 1n one direction, it will contact with said ar1n31 and depressthe lever soias to draw the pin downwardly out of engagement with the hole in 1 the i turret Sfiuand asthehandle is moved in the other direction, the lever and pin willbepermitted to be forced upwardly by the spring 28-so that the pin is ready I for engagement with the nextsocket in the turret with which it The turret is adapted I to support both round shank or box tools and rectangular orforged tools, the object of which is to enable'theutilization of both-kinds of tools without changing turrets and the turret thus formed'isnalso provided with means whereby substantially any angular adj ustment of the forged tools I with respect I to y the axis-ofthe turret may be obtained which is 0f great {advantage in all lathe '-work and particularly in respect to enabling the performance of I successive operations I of different natures upon a single piece of work, as, for in stance boring, turnin g, facing and 55.:chasing, withoutremoving or re-adjustiug the respective tools, after they 'have once been set to the requiredpositions. To'this end theturret is provided with a series of flat vertical faces in which are, formed round-sockets 32adapted to receive the shanks of 'box tools. The remaining portion ofthe head is cutaway intermediate its upperandlower portions between the end walls ofthe two innermost faces in which 65, :are formed the round sockets, to provide :1

horizontally open curved slot 33,between an upper wall 34 and a lower wall of said head. To preserve the- 1."igidity or the head G, the upper and lower walls 34 and 35 are preferably permanently connected "by means of corner bolts 36.

Mounted in the upper wall 34 of the turret 'isa series of set screws 37 whichare disposed near the outer edge of the wall and of which three are shown as provided for each face of the turret. Mounted within the Quterseries of set screws is an innersmaller number of-set screws 38. Both SQtSOf-SiIlCl screws are adaptedtobe forced against the inner 'end of the square or forged tools and owing to the plurality of-screws for each face provided. bythe outer row any tool may be adjusted at substantially any desired angle tothe axis ofthe turret,--in such adjustment the tool being clamped by anyone of the outer set screws-and the inner ,endof center ofthe spindle. )Thepin and hole thus afiord 'atpositive stop which will. preventsuch a straining of the slide relative to the carriage possibleiin the usualformof stops,- {LS-lJOPCIHHt the-turret-to be moved slightly off center.

/ In the assemblage, use and operation of the turret,- the; bolt 12 is engagedwith the turret and with the gib 16 bypassing it upward through the gib and intoiits socket at the upper end of the heafdntwhich upper end it is engaged with the nut1-3. The head 14. of the boltis: smaller in diameter than i the inner threaded circumference of the vertical wall ofthe gib, thus permitting'the head to pass the threads. The turret is then seated and clamped bythe gibs .9 withia runningfitiagainst thesame, in which position it will have a true-inits taper socket, and on the-flat face of the slide-base. The

double screw 1819 is inserted indplace and engaged 'withthe gib and located in position by the, pin 20. a

Any box tools required are inserted in the round openings 32 and clamped 'inposition by the setscrewst). At the same time, if desired, any forgedetoolsthat it may be necessary to use in successivc operations of the=lathe are clamped into position in the slot 33 by means of the setscrews and 38. and angular adjustment permitted by the three laterally spaced set screws for each face of the outer series of screws.

It willbe seen" that owing to the fact that the bearing and centering functions of the turret are obtained by the taper or cone seat turret consists of an integral bo y of metal,

which is substantially solid at the portion having the round sockets andthus a rigid construction is obtained. The centralinte: gral column 12 further insures the rigidity of the head. Theslot 38 may .be elongated to a greater length than shown in the drawa as viewed in Fig. 1, which movement by,

ing and in fact around the entire, circumference if desired. i r j j a 1 In order to lock and locate the turretin the rotative adjusting movement of the latter, when it is desired to bring any one of the tools into engagement with the work, and

assuming first that it is desired to lock theturret in place, the handle 23 is pulled toward the operator, thatis toward the front means of the engaging threads 18 -on the double screwand the movablegib will cause said gib to be moved downwardly so as to clamp its horizontal flange 16 against the upper face of the head 14 ofthe bolt 12,

thus forcing the turret down rigidly into its tapered seat in the slide base 4 and holding. theturret against rotatable movement. At the same time the pin 27 will be projected into that one of. the sockets 24 opposite which the pin has been carried. a The engagement of this pin with the socket, serves to properly locate the turret on the slide and prevent any side or circularloose movement thereof after such adjustment.

It will be seenthat thisrelease of the pin to permit its projeetionbythe spring 28 and i the locking of the gib against the bolt is accomplished by a single movement of the handle in one direction. a a j To unlock the gib from the bolt and with draw the positioning pin from the turret, the handle is. moved in the opposite direction, whereupon the gib will be iuiscrewed from the threads 18, of the fixed screw, thus unclamping the turret from the slide and in such movement of the handle. it will be carried against the arm 31 of the bell crank carrying downward the pin 25 out of the socket bushing 24:, so as to permit the turret to be moved rotatively. This release of the gib and the positioning pin is thus also obtained by a single movement of the handle in one direction.

It will be seen that, owing to the fact that the clamping and positioning pin mechanism is located below the turret, it is possible to place the operating handle adjacent the level ofthe other usual operating handles of the lathe, such as the slide feed screw handle,;

thereby facilitating ease and rapidity of operation in the adjustment of the lathe turret. The pin 41 on the slide by its engagement with the hole in the carriage affords a fixed of metal and having an opening therein with a toolsupportmg base ly ng in a hor1- zontal plane and of sufficient radial depth to receive the shank of a tool so mounted as to project longitudinally from the central partof the turret, said opening being elongated in horizontal planes beyond the width of thetool shank across the line of the depth of the opening to permit of the angular adjustment of the tool or the use of tools of different sizes, and clamping means for the tool exerting pressure in a vertical line.

,2. A lathe turret formed of an integral body having a horizontal slot cut therein which extends inward toward the center of the turret to a depth sufficient to receive a tool projecting longitudinally from the center, a clamping member above the tool and adaptedto exert vertical pressure thereon, said slot being horizontally elongated beyond the width of the tool shank across the line of the depth of the opening to permit of the angular adjustment of the tool around the clamping means as a pivotal center.

3. A lathe turret having a portion of its head provided with circular sockets for receiving round shank tools and an integral portion thereof provided with a fiat plane bearing surface extended inwardly adjacent the center radially ofthe turret and adapted to receive a rectangular tool and elongated being extended inwardly radially adjacent the center of the turret and widened beyond the width of a rectangular tool and adapted to receive the latter and a plurality of tool clamping members for each rectangular tool receiving face.

6. A lathe turret having aportion of its head provided with round tool sockets and having theremaining portion of itshead cutaway to provide a continuous horizontal opening adapted to receive rectangular tools.

7. A lathe turret having socket means for holding rou-nd shank tools and having a circularly elongated horizontal slot adapted to receive rectangular tools and, permitting them to be adjusted at different angles, and a plurality ol tool clan'ipingscrews at'each face of the turret along the border of said slotted portion whereby a tool inay be held at various angles.

8. A lathe turret having socket means for holding round shank tools and having an elongated horizontal slot adapted to receive rectangular tools, a plurality of tool clamping screws foreach slotted face of the head, arrangedadjacent the edge ofsaid head, and an inner concentric series of tool clamping screws.

9. A lathe turret having a head portion provided Withround sockets and having a portion provided witha continuous cutaway horizontal slot adapted to receive rectangrt tobe clamped, and bolts connecting said upper and lower walls of the slotted portion.

11. 'In combination with a lathe turret, a 3 slide on'which said turret is mounted "for rotatable adjustment, a gib fixed to the slide and engaging the turret with a'running fit Copies of thisrpatent may be obtained for five cents each, iiy addressing the Gomniissioner oflPatents,

to prevent upward 'niovement of the turret, a "bolt extending through the turret, tapered seat between the turret and "slide providing a centering and bearin-g surface, an adjustable gib below the turret adapted to engage said bolt and exert a downward pressure thereon and means for operating said latter gib.

12. In combination with a latheturret, a slide on which said turret is mountedfor rotatable adjustment, a screw fixed to said slide b'elowthe turret, a threaded gib engaging said "screw and adapted to exert a downward pull on the turret to lock the same-against the slide, a 1 handle fixed dir'ectly to said *gi-b 11501 turning the same, a positioningpin between the turret and slide and pin-operating means adapted to be actuated by the handle in the clai-nping' movementof the latter,

13. In conibinationwith a lathe turret, a slide on which said turretisanounted for rotatable "movement, a; gib fixed to the slide and having a running with the turret to prevent upward movement of the latter, a bolt 1 extending through said turret, a threaded clamping gib below said turret and engaging the head of said bolt, a screw fixed to the slide airclengaging said threaded g ib, a tapered seat between the turret and slide anda rec procating handle secured to the threaded gib for operating the same.

a slide on which said turret is mounted, a carriage tor the sl1de, -acentermgstop pin carried by theslide, saidcarr-iage having a socket 1 hole into which said {pin is adapted registry liking the a center position otthe turret relative to the spindle.

In witncss whereof, I have hereunto set my hand and seal atl ndianapolis, lvlarion countyylndiana, this 16th day of November, A, D, nineteen hundred and sixteen.

5HARRY W. RANSDALL'. [1,. s.] VVitnesses'z A. C. Bron, H. P. DoomT'rLE.

Washington; DJG.

, 14. In combination with a lathe turret,

\ A u i u I to be pro ected, sa1d pin andsocket when in 

